I can navigate very easily because I have had plenty of practice. Oval casseroles are recommended for speed cook, and they do work the best. I like that we are reminded which tray to use when we poke in the command. Small portions of cookies are fine, but use your GE oven for large batches to save time. The only issue I have: the Reheat function overheats, so keep checking your food. Yes, even with accurate sizes and weights.Be brave and use the programs, and also put in your own recipes.  I used to have to turn on the fan to keep steam from harming the microwave, but this one has its own fan and it seems to know when I am using the range, so no more worries about that.On the website it explains how to clean your Advantium, so I wrote the directions in the back of the cookbook that came with it. Very handy, and maybe they can do that for the next printing.